CVE-2026-128990
xschem 2.9.9 through 3.4.7 Heap Out-of-Bounds Write via rawtovcd read_dataset()
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
0th
xschem 2.9.9 through 3.4.7 contains a heap out-of-bounds write vulnerability in read_dataset() in src/rawtovcd.c due to an unchecked variable index. Attackers can supply a crafted ngspice .raw file that, when converted with rawtovcd, writes file-controlled heap pointers at chosen signed offsets, corrupting heap memory.
| CWE | CWE-787 |
| Vendor | stefan schippers |
| Product | xschem |
| Published | Nov 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Stefan Schippers / xschem
2.9.9 ≤ 3.4.7
References
github.com: https://github.com/StefanSchippers/xschem/commit/e29af39c6133c36bdaf66603fd663231e75517f1 github.com: https://github.com/StefanSchippers/xschem/blob/3.4.7/src/rawtovcd.c#L124-L148 github.com: https://github.com/StefanSchippers/xschem vulncheck.com: https://www.vulncheck.com/advisories/xschem-2.9.9-through-3.4.7-heap-out-of-bounds-write-via-rawtovcd-read-dataset
Credits
Deus Rex